高温高压CO<sub>2</sub>/水交替微观驱油机制及运移特征

doi:10.3981/j.issn.1000-7857.2014.36.013

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Abstract: In this study, a high-temperature and high-pressure microscopic visualization model was used to simulate water flooding, CO₂ flooding and water-alternating-gas (WAG) flooding using CO₂ at 60℃ and 18 MPa in complex reservoirs. Multiphase fluid displacement features in porous media were described in detail by observing the multi-phase fluid flow and residual oil distribution in the process of water flooding, CO₂ flooding and WAG flooding. The residual oil ratio at each process was quantitatively analyzed using image processing technology and software analysis. The experimental results show that WAG flooding not only decreased fluid slipstream in water flooding, but also reduced gas breakthrough along the high permeability pore in CO₂ flooding. WAG flooding made the advantages of water flooding and CO₂ flooding complementary to each other, increasing the oil recovery by 12.31% compared with CO₂ flooding.

Key words： high temperature and high pressure microscopic visualization simulation gas/water alternating flooding improve the recovery efficiency

Received: 29 July 2014

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	Articles by authors
	WANG Ming
	DU Li
	NIE Fajian
	HAN Hongyan
	LONG Yunqian
	SONG Hongqing

Cite this article:

WANG Ming,DU Li,NIE Fajian, et al. Microscopic Visualization Simulation of CO₂/Water Alternating Flooding[J]. Science & Technology Review, 2014, 32(36): 80-85.

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http://www.kjdb.org/EN/10.3981/j.issn.1000-7857.2014.36.013 OR http://www.kjdb.org/EN/Y2014/V32/I36/80

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